Antifriction bearings



Oct. 4, 1955 G, GRM/,ER 2,719,764

ANTIFRICTION BEARINGS Filed July 15, 1954 v 2 Sheetsheetl ff/g2 2o 5 f Oct. 4, 1955 G. GRAVIER 2,719,764

ANTIFRICTION BEARINGS Filed July 13,1954 2 Sheets-Sheet 2 United States Patent AN TIFRICTION GS Georges Gravie'r, Pa'ri's, Application July 13, 1954, Serial No. 443,118 Claims priority, application France V-'7, "19'54 9 Claims. Y(Cl. 30S-187.2)

The present invention relates -to rtluid-tight zantifricti'on bearings comprising rolling elements which-may be either rollers or balls.

One object of 'the present invention :is :to provide a bearing assemblage -of very simple :parts :capable fof economical production and adapted -fortreliably preventing escape of lubricant :on .the -one hand -and entry of dirt and foreign matter on 'theother hand.

A -further object lis `to .attain =internal lsealing .of :the bearing by means of fa divided -c`age comprising annular parts under the iniluence of springs tending Ato -separate them 'and cause them to fm'ake endwise sealing pressure against abutment rings mounted within the -bearing casing.

Yet another object :is -to provide .Ifo'r ythe external sealing 'of -the Kbearing by jmeans v of annular screens supported peripherally 'of the bearing, -lthe'se annular screens -being advantageously used in conjunction with packing `.rings disposed on the ends of the bearing and inwardly of the said screens. v

These and other objects and advantages will appear from the following-detailed description with reference to annexed drawing.

Practical constructionsembodying'the invention are illustrated by way of example in the .accompanying drawings wherein: Y

lFigure 13is=a central vertical section ithrough-the upper part of a bearing assembly.

Figure 2 is a fragmentary section of the line II-II of Figure 1.

Figure 3 is a view similar to Figure 1, showing a modification.

Figure 4 is a View similar to Figure 1, but on an smaller scale, the view in this case being of the lower part of a bearing assembly according to a further modification and the section being taken on a line similar to that marked IV-IV in Figure 2.

Figure 5 is an exploded perspective view of the bearing in Figure 4 in a partially assembled condition.

Figure 6 is a perspective view of a half cage containing the rolling elements of Figure 4.

Figure 7 is similar to Figure 6, but showing the complementary half cage, and

Figure 8 is a perspective view of the completed bearing illustrated in Figures 4 to 7.

In the drawings, the bearing has an axis of revolution 1 and comprises, in known manner, a casing composed of a hub part 2 and an external cylindrical part 3. The bearing elements 4 (rollers or balls; rollers being shown in Figure l) are located between the two casing parts 2 and 3, the said bearing elements rolling on and in races 5 and 6 which are respectively fretted, shrunk or tightly mounted on the hub part 2 and in the external part 3. The positions of these races are defined laterally by pairs of concentric abutment rings 7 and 8 which are held between the races and anges 9 and 10 formed on the casing parts 2 and 3, respectively. A very small clearance 2,719,764 Patented Get. :4, Vl 955 1:1is provided `between members 4of a pairsof rings 8, 'this clearance k'forming :a ring which :coincides 'with am iring Fcontai-nin'g Ythe :axes .f1-2 around which ithe bearing `:elements 4 individually roll. Externally :of Mire side plates 7 and 8 are protective annular :screens 213 having their :peripheral edges 'clamped between fthe :side plates 8 Sand the `flanges 10., but which extend inwardly only so far as to leave a slight yclearance `between themselvesfand therflanges 9. fIn 'Figure ll, :theabutment rings 7 and fare bev'e'lled toprovide scafi-ugs I14'sin the vicinity of the clearances 1:1, -which rseatings are 'adapted to 'rece'iv'e packing .rings 15 Ytif -any suitable material fm' the purpose of completing Athe Ifluid `tightness and if'or preventing dust or other foreign matter from penetrating into thespa'ces Ell.

'.Ian'rthe :modification seen fn :Figure 4, similar parts fare indicated ybythe 'same Vreferences .ias are in Jligure i1.. In ithi's modification, fhowever, the packing .rings 15 'of Figure l zare replaced :by nat packing 25 ro'f cork .or 'the like. The :rings .7 are' formed With hat recesses to :seat fthe cork rings .25 and #the flatter fare 4.retained 'in such-sesame bythe annular :screens .13 `-which haveiheir peripheral edges clamped vbet'v'vc'en fthe an'g'es 10 l'an'd the rings '8, as before.

-.A 'cage for 'the `rolling elements 4 iis :made ef "we cylindrical parts 16 and 17 (Figures l, 2 and =4 'ito 7). fEachacagc part iis formed 'with seatin'gs '127 for the bearing elements 4. in iis "to fbe noted :that the bearin'g elements -4 are shown las ib'al-ls :in .Figures 5 and 6 fand fas lrol'lers i'n Figures l to 3. Springs 24 (Figures 3, 4 and 6) 'are interposed .between the-.cage '.parts,1thefendsoffsnch springs being received :in suitable 'seatings k18 aand 126 (Flgures .2, v6 fand 7i). :springs 24 .-'actlo'n 4the said -eage -parts 1% .and f1-7 in suc'h manner that projecting annular fenl 'surface pa'r2ts11'9-(1Figures fandS) :areapplielfag'ainst *theehuiment rings `7 and 8 to hermetically seal the spaces :coneentricity fof =the cage lparts is effected-either by a suitable #number :of studs, 'which are Vshawn 4rtt'lt'll'ni Figure 2, for lfsil'nply by the penetration dfi-the spingsi into the seatings, namely `158 vin fthe fone -eage xp'artflf, yand 262thgtheetherzcagerpart#Bl-(Figures an'f'). f-e's'iretl, une cage 1lm'rtrinay be adapted fo'rthe iniinfgftherenrufcme end of the springs 24, the other end of the latter extending freely into corresponding recesses in the other cage part.

The modification shown in Figure 3 is more particularly applicable to a rollerbearing. In this case, the cage is formed by four elements instead of two and comprises two side washer rings 22 and two cage rings 23. The rings 23 are urged by springs 24 against the washers 22 which ensures the fluid tightness by sealing the spaces 11. The rollers 4 in this case are formed with end journals 4a of smaller diameter which are seated in bores formed in the rings 23. The ends of the journals 4a may also engage in circular recesses formed in the inner surfaces of the washer rings 22.

The assembly of the bearing is carried out as follows: an unllanged external casing part 3 receives the bearing race 6 which is tightly fixed therein. To one side of the race 6 there is a ring 8 and a screen 13 and the end of the casing part at this side is formed with a ange 10. The bearing race 5 is Xedly mounted on the hub part 2 which at this time is untlanged, an abutment ring 7 is placed on the hub and kept in place by forming a flange 9 on the hub part. The halves of the cage 16 and 17 containing the bearing elements 4 and springs are then assembled. This assembly is introduced into the external casing part 3 and over a hub part 2. The second abutment ring 7 is then passed on to the hub part 2 and the second ange 9 is formed. Firstly, the second abutment ring 8 and the second screen 13 are then fitted, and the second llange 10 of the part 3 is formed. The bearing then has the appearance which is shown in Figure 8.

In all cases, the devices according to the invention enable the space 21 in which the bearing elements 4 are located to be made completely Huid-tight; this space may then be suitably lubricated without loss of lubricant and without introduction of dust or foreign matter coming from outside, even if the bearing is employed in a machine subjected to very hard and very dirtyy working conditions, for example, in a transporter or conveyor for minerals or the like.

In the case where the bearing is a roller bearing, these rollers are preferably journalled at each end, as in the example shown in Figure 3.

It is to be understood that the examples which have been described and illustrated have only been given by way of example and may be subjected to various modifications of detail without departing from the scope of the invention as deiined Aby the claims.

I claim:

l. In an anti-friction bearing, in combination spaced concentric. cylindrical members having opposing flanges at each side thereof, inner and outer bearing races mounted in said concentric members, a bearing cage formed of two half sections disposed between said races and having bearing members therein engaging the races, a pair of spaced concentric ring members at each side of the cage enclosing the races, a plurality of springs disposed between the halves of the bearing cage pressing each cage half into bearing engagement with the sides of the ring members adjacent the opening therebetween said concentric ring members being engaged by the opposing J anges of the concentric cylindrical members to form the bearing, the space between the concentric ring members providing for admission of lubricant to the bearing members.

2. The anti-friction bearing member as in claim l having an annular screen seated between one of the iianges of the cylindrical member and the adjacent concentric ring member at each side of the bearing and extending across the adjacent opening between the concentric ring members.

3. The anti-friction bearing member as in claim 2 having packing rings seated in the space between said concentric rings to seal the lubricant openings.

4. 'Ille anti-friction bearing member as in claim 2 in which the other of the concentric ring members at each side lof the bearings is oiset inwardly from the adjacent V'iiangeiof the cylindrical member to receive the packing ring which extends across the lubricant opening between the concentric rings to seal the opening and are held in place between adjacent annular screen.

5. The anti-friction bearing as in claim l in which the opposing faces of the cage halves have suitable openings for the support of the bearing members and springs.

6. The anti-friction bearing as in claim 1 in which the opposing faces of the cage halves are provided with openings for reception of studs for preserving the concentric assemblyof the cage parts.

7. The anti-friction bearing as in claim 1 in which one cage half has suitable apertures within which the springs are secured and the opposing face of the other cage half is provided with registered openings within which the free ends of the springs are inserted.

8. In an anti-friction bearing, in combination spaced concentric cylindrical members having opposing anges at each side thereof, inner and outer bearing races mount ed in said concentric members, a bearing cage formed of tworhalf sections disposed between said races, each said bearing cage half having opposing annularly arranged apertures therein, roller bearings disposed between the cage halves and provided with reduced end portions extending through the adjacent apertures of the cage halves, a plurality of springs disposed between said cage halves for resiliently urging them apart,a pair of spaced concentric rings at each side of the 4cage enclosing the races and retained -in engagement therewith-by the opposing ilanges of the concentric cylindrical members, and end plate members at each side of the bearing cage supported upon the roller bearing extending end portions for closing the space between the adjacent concentric ring members.

9. The anti-friction bearing as in claim 8 in which the bearing cage springs resiliently press the plate members against the concentric rings to seal the space therebetween..

YReferences Ctedin the file of this patent j UNITED STATES PATENTS 1,302,825 Meier May 6, 1919 2,112,754 Annen Mar. 29, 1938 FOREIGN PATENTS 507,359 Y .France sept. 14, 1930 

